| // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "printing/page_number.h" |
| |
| #include <limits> |
| |
| #include "base/logging.h" |
| #include "printing/print_settings.h" |
| |
| namespace printing { |
| |
| PageNumber::PageNumber(const PrintSettings& settings, int document_page_count) { |
| Init(settings, document_page_count); |
| } |
| |
| PageNumber::PageNumber() |
| : ranges_(NULL), |
| page_number_(-1), |
| page_range_index_(-1), |
| document_page_count_(0) { |
| } |
| |
| void PageNumber::operator=(const PageNumber& other) { |
| ranges_ = other.ranges_; |
| page_number_ = other.page_number_; |
| page_range_index_ = other.page_range_index_; |
| document_page_count_ = other.document_page_count_; |
| } |
| |
| void PageNumber::Init(const PrintSettings& settings, int document_page_count) { |
| DCHECK(document_page_count); |
| ranges_ = settings.ranges.empty() ? NULL : &settings.ranges; |
| document_page_count_ = document_page_count; |
| if (ranges_) { |
| page_range_index_ = 0; |
| page_number_ = (*ranges_)[0].from; |
| } else { |
| if (document_page_count) { |
| page_number_ = 0; |
| } else { |
| page_number_ = -1; |
| } |
| page_range_index_ = -1; |
| } |
| } |
| |
| int PageNumber::operator++() { |
| if (!ranges_) { |
| // Switch to next page. |
| if (++page_number_ == document_page_count_) { |
| // Finished. |
| *this = npos(); |
| } |
| } else { |
| // Switch to next page. |
| ++page_number_; |
| // Page ranges are inclusive. |
| if (page_number_ > (*ranges_)[page_range_index_].to) { |
| DCHECK(ranges_->size() <= static_cast<size_t>( |
| std::numeric_limits<int>::max())); |
| if (++page_range_index_ == static_cast<int>(ranges_->size())) { |
| // Finished. |
| *this = npos(); |
| } else { |
| page_number_ = (*ranges_)[page_range_index_].from; |
| } |
| } |
| } |
| return ToInt(); |
| } |
| |
| bool PageNumber::operator==(const PageNumber& other) const { |
| return page_number_ == other.page_number_ && |
| page_range_index_ == other.page_range_index_; |
| } |
| bool PageNumber::operator!=(const PageNumber& other) const { |
| return page_number_ != other.page_number_ || |
| page_range_index_ != other.page_range_index_; |
| } |
| |
| } // namespace printing |